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Wedge Anchor, Nut... but do you need the nut in this case?

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Wedge Anchor, Nut... but do you need the nut in this case?

Old 05-05-2018, 05:59 AM
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Question Wedge Anchor, Nut... but do you need the nut in this case?

The eye nut you see there is 316 stainless, as is the wedge anchor (both 3/4"-10)

My question:

Do you still need the nut or do you only use the eye nut?

Concrete embedded > Washer> Nut > Eye Nut
-or-
Concrete embedded >Washer>Eye Nut
-or-
Something else?

I'm thinking that having it "standing off" the additional height of the first nut is a bad idea, but I'm not so sure.

Thanks,
Pete


Old 05-05-2018, 06:57 AM
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Use the first nut to "set " the anchor. Once its right you can remove it and put the eye on. Just hard to get enough torque using just the eye. The nut underneath won't hurt anything or just get some epoxy and glue in a piece of threadall and then install your eye
Old 05-05-2018, 07:40 AM
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As above you can remove nut after anchor is set. Make sure you torque the expansion bolt per manufacturer instructions. If not capacity will be less.

Do not use epoxy anchors for permanent tension loads. Look up big dig failure in boston. Expansion bolt like you have is good for tension.
Old 05-05-2018, 07:44 AM
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10-4 on torque to spec...

If I want to help reduce the chance of the eye nut coming off... do you have thoughts? Lock washer behind it? (not sure if that would help)... or just some heavy-duty thread sealant?
Old 05-05-2018, 07:46 AM
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Just use a flat washer underneath and some lock tite
Old 05-05-2018, 07:47 AM
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You boys know your boats . Proud for y,all
. All the best . Vince
Old 05-05-2018, 08:21 AM
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you probably two nuts... one to torque it (the anchor) against the surface you are mounting it on and one to act as a lock nut that is tightened against the back of the eye nut.
Old 05-05-2018, 08:24 AM
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Just for peace of mind I would want to keep constant tension on the wedge. Yes I would tighten the nut and let it in place.
Old 05-05-2018, 08:26 AM
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Originally Posted by dmartin View Post
Just for peace of mind I would want to keep constant tension on the wedge. Yes I would tighten the nut and let it in place.
This. I've removed plenty of wedge anchors by tappimg them back in and releasing the wedge.
Old 05-05-2018, 08:30 AM
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Thanks guys. I will say that, for some reason, the eye-nut seems to "bite" much better when up against the nut instead of just the washer. I'm not sure why that is... but it does.

So... you're thinking.

Concrete, washer, nut, eye-nut. Locktite 263 (Red High Strength) between the eye-nut and the wedge...
Old 05-05-2018, 09:33 AM
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Originally Posted by OldPete View Post
Thanks guys. I will say that, for some reason, the eye-nut seems to "bite" much better when up against the nut instead of just the washer. I'm not sure why that is... but it does.

So... you're thinking.

Concrete, washer, nut, eye-nut. Locktite 263 (Red High Strength) between the eye-nut and the wedge...
Sounds good.
Old 05-05-2018, 09:47 AM
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Thanks guys... I know I've been over-the-top with this, but I just want it right. Much appreciate all the help.

Pete
Old 05-05-2018, 02:26 PM
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Must be one helluva a dungeon you are building....
Old 05-05-2018, 03:57 PM
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You definitely need the nut to torque and set the wedge anchor.

If this is in direct tension I would feel better if you had 2 anchors attaching a channel or angle with the eye bolt attached to the channel or angle
Old 05-05-2018, 08:04 PM
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Originally Posted by wahoo wacker View Post
Must be one helluva a dungeon you are building....
im guessing it’s for a sex swing.
Im pretty sure this is the second thread on the same project, and I really hope the OP posts the finished product
Old 05-06-2018, 10:18 AM
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I know this is a dumb question but your planning on using this on cured cement that you have drilled?
Old 05-06-2018, 12:37 PM
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Originally Posted by fishingfun View Post
I know this is a dumb question but your planning on using this on cured cement that you have drilled?
Yes. Wedge anchors are only for cured concrete.
Old 05-06-2018, 07:14 PM
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Use threaded rod and epoxy. It is stronger than a wedge anchor and has the added benefit of sealing the top of the hole.
Old 05-07-2018, 08:18 AM
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Originally Posted by RockportFisher View Post
Use the first nut to "set " the anchor. Once its right you can remove it and put the eye on. Just hard to get enough torque using just the eye. The nut underneath won't hurt anything or just get some epoxy and glue in a piece of threadall and then install your eye
Agree plus it's easier to set the anchor if you put a fender washer under the nut. I always use 2 nuts locked at the top of the rod when I set it with a hammer before locking it down; two nuts protect the threads.

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